Art of separating materials from gases.



W. J. BALDWIN. ART or SBPARATING MATERIALS PROM GASES. v APPLIOATIQN FILED NOV. l, 1910. V 1,057,613, Patented Api'. 1, 1913.

3 SHEETS-SHBBT l.

} 33) n @pakking/gw W. J. BALDWIN.

ART 0F SEPARATING MATERIALS FROM GASES.

4 APPLICATION FILED NOV. 1, 1910. Q'ylgm Patented Apr. I, 1913.

n 3 SHBBTS-SHEBT 2.

W. J. BALDWIN. ART 0F SBPARATING MATERIALS FROMGASES.

APPLICATION FILED NOV.1, 1910.

a SHEETS-SHEET a.

atented Apr. 1

l the artof separating iiNiTED STATES PATENT onirica..

WILLIAM J'. BALDWIN', 0F BRGOKLYN, NEW lYORK.

ART or SEPARATING MATERIALS rnoM' GASES.v

intacts.

Specification of Letters Patent.

To all whom t may concern Beit known that I, WILLIAM J. BALDWIN, a citizen of the United States, and a resident of the borough of Brooklyn, in the county of Kings and State'of New-York,V have invented certain new and useful Improvements in the Art of Separating Materials yfrom Gases, of which the following is a specification.

This invention relates to improvements in materials from gases, and includes both the process and the apparatus for applying the process. L

In particular, the purpose of the invention is to obtain a high eiiiciency of separal tion by moisten'ing the particles with Water or any other suita eiiuid, as suitable chemical reagents, which lwill bring even the nely divided particles into such condition that they are acted on by centrifugal force, and by subjecting the agglomerates which result from said wetting ofthe particles to the accelerating effect f [rotary baskets,- whereby great rotative velocity is imparted, or re-added, to the said agglomeratesvand i they are thrown out of the gas, which term of the apparatus. a5`

includes atmospheric air as well as any other gas, by this effective centrifugal force. lt is I lfurther intended to use a fluid to condense volatile acids or other condensable constitu-Y ents, held in air or other fixed gases, and to bring the agglomeratedfluid and condensed vapor within the eective centrifugal force By this invention, moreover, the water or other Huid used to wet or condense-or miX with the particles is thrown out across the path of the fair or gas, and does not go along wit-hy it, and this is a point of much importance; for, by reasonpf this advantage, the invention furnishes dry air or gas, the water or other Huid which is used to wet or condense the particles Jbeing thrown out of the air or gas together with the mixture before said air or gas is delivered 4from the apparatus.

The invention is applicable to removing dust and other impurities from air for ventilating purposes; to condensing and vremoving acid or other condensableJ vapors` and throwing them through the baskets as a fluid or semi-fluid; to removin saw-dust, flourdust, marble-dust, and ot er fine particles from air of work shops; to removin the smoke particles from gases of combus ion; to removing, condensing and recovering various substances, such as acids, formed in the.

course of various manufactures; and in gen.-

ratenteeiapr. i. isis. Application filed November 1, 1910. Serial No. 590,235.

=eral to separating anyinely divided solidI include all gas including atmospheric air, and the term dust toinclude all materialswhether solid or fluid, to be separated from the gas.. f'

My invention may be applied by various apparatus, and l show several modifications of apparatus in the accompanying drawings,

and hereinafter describe the same, without,

however, intending to limit myself theretcv.4

fan'is outside the baskets. F ig. -3 is a cross section ron the broken line c-d of Fig. 2. lt is also substantially a cross section on the i broken line c-d of Fig. 1.- Fig. 4 is an elevation of the fan and ofFig. 2, the casing being removed.

Referring to Fig. l, within a case A pro- -vided with suitable inlet a, for lgas 'and material, revolve a plurality of perforated ybaskets 1, 2 and'. Any number of .baskets may be used, and they are preferably, but not necessarily, concentric and of conical shape. The space between each basket and the adjacent basket or baskets, is divided into cells by ribs or'partitions 5. 'llhe inner edges of said partitions are secu-red to the rotary driven shaft Gaand 7/, which may be formedhollow and in part of flaringshape as shown, to constitute a filler, the conical y portion of the shaft being suitably perforated for the discharge of the fluid Vinto the basket cells. A suitable Huid may be delivered to said shaft 6, 7 bya pipe 9 from any supply suitable packing making a proper joint between said pipe 9 and shaft 6, The uid supplied to the interior of said shaft will be discharged'therefrom by centrifugal force, and into the cells of the baskets, being thrown out through the perl.

forations of one basket into-the next, through the perfor-ations of that -into the next basket,

and so on, until it discharges through theoutermost basket into the casing A. rlhe inner end pf said shaft 6, 7V is preferably closed, and a tller 12 is Aarranged preferably adjacent thereto, and in the gaseous 'discharge 13. Said liller 12 is advantageous in y promotingothe proper outward flow of gas from the interior of saidg baskets, and pre' vent-ing return eddies at the center, and I prefer to contract thef outlet end of said discharge 13 to about the area of said inlet a," and the machine is preferably so constructed that the gas-flow pssages are of approxi-I from inlet to outlet of mately the same are themachine.

The addition of suitable fluid to wet the dust or condense the vapors has the great advantage that the finest particles, which, if dry, might get through the machine, arev agglomerated by the iuid into particles which are thrown out by the centrifugal force, and the construction with the plurality of baskets, alsoinsures that no dust or body ofl gast containing dust can 'pass' through the machine without being acted on, as will be hereinafter further explained in connection with the operation of the apparatus. If desired the casing A may be connected from a point .outside the baskets to the inlet by a return controlled by a suitable closure. The processcis 'operated by said machine as follows: Gas containing the dust enters by inlet a, and passes into they cellular baskets 1, 2, and 3, the conical form o f the baskets and shaft 7 and the arrangej ment of the partitions or'blades 5 consti- -tuting a centrifugal fan or blower, wherebythe gas with the dust is put into rapid rotation, and given aforward direction. Fluid flying out from the orifices of shaft or liller 7, wets or condenses the dust, whichy fliesl outwardly through thel gas until it 4meets a basket. The basket imparts additional rotary velocity and centrifugal force to the agglomerates of 'dust and fluid, and they fly out of the basket orifices into the space between that basket and the next outer basket, receiving further acceleration from the next basket, and so on until they finally fly into casing A, dropping down to the hopper b, which is provided with any suitable closure, and being removed as desired. An advantage of the multi-basket form is that greater velocities and greater pressures exist in the outer annular passages of thev apparatus, and this can be carried to such anv extent, that the slower currents of gas, near the center are', relatively retarded and can -be so retarded that the gas in held for a longer time near the/,center of the apparatus and will .thus be acted upon for a longer time by the Huid. This is particularly ad vantageous, because the liner particles, which are the morevdiiic'ult to separate from 1 the gas, are nearer the center, and the aforesaid, retardation retains them for a longer time under the action of the apparatus, and therefore increases the eiiciency of their sep-v aration. The iuid is also very effectually roer/,cia

removed from the gas, being driven out of .the gas by the centrifugal force before' 1t can reach the outlet, and therefore the in-y vention not only effects a very eflicient separation of dust from gases, but also produces an eflicient ldrying action upon the. gas, which is sometimes of great utility, as in ventilation. TheI gas freed from the material discharges by its proper out-let 13 com municating with the interior of the baskets, and is delivered Ito any place, or applied tov any use, as desired:

Referring to AFlgs. 2, 3 and 4, the perforated baskets 20, 21 and 22, of which there may be any number, arranged concentrically or otherwise, and of anyfdesired shape, are indicated as having cylindrical bodies, .and

the outer one (Fig. 2) as having a conical end secured to the shell 24 of the. fan. The spaces between each basket and; the adjacent basket are divided into cells by partitions or ribs 26, the outer partitions being preferably longer than the'inner. The pre- 4ferred construction divides the spaces with in said baskets 20, 21 and 22 into spaces which I term cells, and I prefer to construct .the fanwith corresponding cells, 29 being partitions between the fan blades 28.

The inner ends of said blades 28'are-pregf- The case A, inlet a, outlet 13, are

be connected from .a point outside the jbaskets to the inlet by a connection d provided with a closure. A suitablefluid is delivered to this form of machine by a pipe 40, preferably provided with'- an annular spraying head 41, whereby the iuid is sprayed into the fan and baskets, wetting the surfaces and the dust. Fluid can also be admitted to the basketsby using a hollow filler with perforated wall and deliveringl the Huid into the ller, whence it will be thrown into the baskets.

It will be clearly understood from the foregoing explanation and description, that" the fan imparts rotary motion and forward direction to the gas containing the and forces it into the baskets, that the flu1d ust,

lforms the dust into agglomerates, which are.. acted on by centrifugal force and thrown out through the orifices of .the several baskets, being accelerated by each basket, and being finally discharged into the caslng A', falling into-the hopper 42, provided with suitable closure, and -being removed as des ired. `The fluid is also thoroughly removed from the gas and the gas dried, as explained in connection with Fig. l, and the gas from which the dustl has been removed discharges by its proper outlet 13.

It will be understood that in all forms of the apparatus, the casing forms a normally closed chamber within which the baskets are located, that the dust passes into the chamber, and that the gas from which the dust is removed passes out by its proper outlet, as hereinbefore explained. In large sizes, the walls of the room in which the apparatusis set up may constitute the casing.

The cellular construction of the baskets can be obtained by fitting a single'fbasket with such material as coke, the interstices between the pieces of coke forming cells, and many materials may be used. rI`he cellular construction may also be produced by using numerous layers of wire mesh or like material one within another. In such case the wire mesh will itself form the plurality of baskets.

The cellular construction is an important feature of my invention, but it is not herein claimed, the said construction being claimed in another application, which is a division of the present application.

Now having described my improvements, I claim as my invention- 1. 'Ihe process of separating gas and heavier materials, consisting in forcing the gas longitudinally through a hollow perforated rotary cylinder from end to end thereof and out of the end of said cylinder, and forcing the materials substantially radially through the periphery of said perforated cylinder.

2. The process of separating gas and heavier materials, consisting in forcing the gaslongitudinally through the spaces between a' plurality of hollow perforated rotar cylindersfrom end to end of said spaces an out of the endof said spaces, and forcing the materials substantially radially through the perforated walls of said cylinders.

3. .The process of separating gas aand heavier materials, consisting in wetting the materials'to form agglomerates, forcing the gas longitudinally through a hollow perforated rotarv cylinder from end to end thereof out of the end of said cylinder, and forcing the agglomerates substantially rw dially through said perforated cylinder.

4. Ihe process of separating gas an heavier materials, consisting n Wettlng the materials to form agglomerates, forcing the gas longitudinally through the spaces between a pluralit rated cylinders fiom end to end thereof and out of the ends of said spaces, and forcing the agglomerates substantially radially .though the perforated walls of said cylin ers.

5. In apparatus for separating gas and' of hollow rotating perfoouter case, a plurality of rot-ary cylinders therein provided with perforated walls adapted to permit the passage through them of the said heavier material, and said cyl; inders having annular spaces between them open from end to end and adapted to permit the passage of gas therethrough and outl of the ends of said spaces.

7. In apparatus for separating gas and theavier material, the combination of .an outer case, a rotary cylinder therein having open ends and a perforated wall adapted to permit the passage `therethrough of material, and said cylinder having an internal space opened from end to end and adapted to permit the passage of gas therethrough, and means for supplying fluid to the gas and material.

8. In apparatus for separating gas and heavier material, the combination of -an outer case, a plurality of rotary cylinders therein, having perforated walls adapted to permit the passage of said heavier material therethrough, and said cylinders having annular spaces between them open from end to end and adapted to p'ermit the passage of gas therethrough and out of the endsrof said spaces, and means for supplying Huid to the gas and material;

Signed at New York city, in the county of New York and State of New York this 31st day of October, A. D. 1910.

WILLIAM QI. BALDWIN.

Witnesses:

G. W. I-IoriiINs, WALTER N. HARRIS.

eoV 

